Nathan Algren is an American hired to instruct the Japanese army in the ways of modern warfare, which finds him learning to respect the samurai and the honorable principles that rule them. Pressed to destroy the samurai's way of life in the name of modernization and open trade, Algren decides to become an ultimate warrior himself and to fight for their right to exist.

Kanichiro Yoshimura is a Samurai and Family man who can no longer support his wife and children on the the low pay he receives from his small town clan, he is forced by the love for his family to leave for the city in search of higher pay to support them.